<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	</head>
	<body>
		<script>
//			%运算 ==> 求余数

			var num = 10;
			var re = num%4;// 10/3 商是3 余 1
			console.log(re);
			
		</script>
	</body>
</html>
